General Oka (Commander Robinson) is Megumi Oka's father. He is the 17th heir of the Kōga-ryū ninja, a co-designer of Voltes V, and commander of the Earth International Defense Force.

Spoiler

On the verge of retirement due to ill health; he dies late in the series saving his daughter from a Boazanian beast fighter that had the power to control people's minds.

(Source: Wikipedia)